1. Preheat oven to 375 degrees and lightly oil a 9 x 13-inch baking pan. In a medium bowl, whisk together flour, baking soda, salt, and cinnamon and set aside.

2. In a large bowl, combine pumpkin with baking powder. Add oil, sugar, and vanilla. Stir to combine. Mix dry ingredients into wet ingredients, one half at a time, and stir to combine. Mix in chocolate chips.